Common side effects may affect up to 1 in 10 people.
- Nausea (feeling sick)
- Facial flushing (where your face turns red)
- Hot flash (a sudden feeling of heat in your upper body)
- Indigestion (this could feel like heartburn or bloating)
- Color change to vision
- Blurred vision
- Visual disturbance
- Stuffy nose
- Dizziness
Uncommon side effects may affect up to 1 in 100 people. These include:
- Vomiting
- Skin rash
- Eye irritation
- Bloodshot eyes/red eyes
- Eye pain
- Seeing flashes of light
- Visual brightness
- Light sensitivity
- Watery eyes
- Pounding heartbeat
- Rapid heartbeat
- High blood pressure
- Low blood pressure
- Muscle pain
- Feeling sleepy
- Reduced sense of touch
- Vertigo
- Ringing in the ears (tinnitus)
- Dry mouth
- Blocked or stuffy sinuses
- Inflammation of the lining of the nose (symptoms include runny nose, sneezing and stuffy nose)
- Upper abdominal pain,
- Gastro-esophageal reflux disease (symptoms include heartburn)
- Blood in urine
- Pain in the arms or legs
- Nosebleed
- Feeling hot
- Feeling tired
Rare side effects may affect up to 1 in 1,000 people, and include:
- Fainting
- Stroke
- Heart attack
- Irregular heartbeat
- Temporary decreased blood flow to parts of the brain
- Feeling of tightening of the throat
- Numb mouth
- Bleeding at the back of the eye
- Double vision
- Reduced sharpness of vision
- Abnormal sensation in the eye
- Swelling of the eye or eyelid
- Small particles or spots in your vision
- Seeing halos around lights
- Dilation of the pupil of the eye
- Discoloration of the white of the eye
- Penile bleeding
- Presence of blood in semen
- Dry nose
- Swelling of the inside of the nose
- Feeling irritable
- Sudden decrease or loss of hearing